#ifndef FE_H
#define FE_H

#include "crypto_int32.h"

typedef crypto_int32 fe[10];

/*
fe means field element.
Here the field is \Z/(2^255-19).
An element t, entries t[0]...t[9], represents the integer
t[0]+2^26 t[1]+2^51 t[2]+2^77 t[3]+2^102 t[4]+...+2^230 t[9].
Bounds on each t[i] vary depending on context.
*/

extern void fe_frombytes(fe, const unsigned char *);
extern void fe_tobytes(unsigned char *, const fe);

extern void fe_copy(fe, const fe);
extern int fe_isnonzero(const fe);
extern int fe_isnegative(const fe);
extern void fe_0(fe);
extern void fe_1(fe);
extern void fe_cswap(fe, fe, unsigned int);
extern void fe_cmov(fe, const fe, unsigned int);

extern void fe_add(fe, const fe, const fe);
extern void fe_sub(fe, const fe, const fe);
extern void fe_neg(fe, const fe);
extern void fe_mul(fe, const fe, const fe);
extern void fe_sq(fe, const fe);
extern void fe_sq2(fe, const fe);
extern void fe_mul121666(fe, const fe);
extern void fe_invert(fe, const fe);
extern void fe_pow22523(fe, const fe);

extern void fe_print(fe);

#endif
